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Slow Cooker French Onion Soup Recipe

Slow Cooker French Onion Soup Recipe

It's hard to believe something this delightful came from a slow cooker! Topped with a slice of French bread and provolone cheese, individual servings of this French onion soup are sure to be enjoyed by everyone at your dinner table. —Kris Ritter, Pittsburgh, Pennsylvania
TOTAL TIME: Prep: 15 min. Cook: 8 hours YIELD:4 servings


  • 2 large sweet onions, thinly sliced (about 4 cups)
  • 1/4 cup butter, cubed
  • 2 cans (14-1/2 ounces each) beef broth
  • 2 tablespoons sherry or additional beef broth
  • 1/2 teaspoon pepper
  • 4 slices French bread (1/2 inch thick), toasted
  • 4 slices provolone cheese


  • 1. Place onions and butter in a 1-1/2-qt. slow cooker coated with cooking spray. Cover and cook on low for 6 hours or until onions are tender. Stir in the broth, sherry and pepper. Cover and cook 2-3 hours longer or until heated through.
  • 2. Ladle soup into ovenproof bowls. Top each with a slice of toast and cheese. Broil 4-6 in. from the heat for 2-3 minutes or until cheese is melted. Serve immediately. Yield: 4 servings.

Nutritional Facts

1 cup: 267 calories, 20g fat (12g saturated fat), 50mg cholesterol, 1324mg sodium, 10g carbohydrate (2g sugars, 1g fiber), 11g protein.

Reviews for Slow Cooker French Onion Soup

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justmbeth User ID: 1196484 259842
Reviewed Jan. 17, 2017

"This was a decent French onion soup, much less complicated than some recipes. Tasty and simple...perfect for a weeknight."

shar6024 User ID: 1138668 253897
Reviewed Sep. 9, 2016

"I doubled the recipe and this turned out great. I also added another onion and some garlic as well and it tasted great definitely will make again"

[email protected] User ID: 269392 237992
Reviewed Nov. 24, 2015

"This soup is absolutely wonderful. I only had 1 sweet onion so I added a red onion. That is the only change. My husband will ask for this often!"

Lovepiggs User ID: 986676 175720
Reviewed Nov. 23, 2014

"I just made this tonight. My first time making French Onion soup. It was easy and really really delicious. I used a box of Trader Joe's beef broth instead of canned. I added a bay leaf, and 1 tsp of beef granules. Everything else was exactly the same. (I did cook the onions on the stove to save time, and then put them in the crockpot with the broth. I will definitely make again. Hubby loved it too."

kredhead User ID: 710648 142246
Reviewed Mar. 23, 2014

"I smashed this recipe together with another one to make a great French onion soup. Caramelized the onions in a pan first. Added 1 can of progresso French onion soup, 1 can Campbells consommé, 1 teaspoon of better than bouillon beef flavor, lawrys, parsley, garlic, salt, bay leaf. Those extra ingredients only take a minute to add and gives it a depth of flavor it needs. I triple the recipe, we love it."

askiba User ID: 7247140 210198
Reviewed Feb. 22, 2014

"I have made this several times and it's great! My boyfriend says it's the best he has ever had. It's our favorite soup!"

zookeeperk User ID: 819663 161781
Reviewed Nov. 16, 2013

"Made this recipe and once I tasted it I wished I didn't have to share..."

Summy User ID: 1386846 91931
Reviewed Sep. 25, 2013

"This was lacking something. Maybe it's the brand of beef broth that I used. I think next time I might even use a can of condensed French onion soup instead of just beef broth. I really loved how the slow cooker began to caramelize the onions. I let them cook almost two hours longer to give them a nice golden color. Like BobbiBacha, I, too, was coming down with something, and ate this and woke up this morning feeling great!"

mjlouk User ID: 1712085 108301
Reviewed Mar. 14, 2013

"I would give this recipe another try since I wasn't able to follow the instructions to the letter the first time. We were going to be gone all day so I dumped everything in the crockpot all at once. It was okay, but I'm sure it would have been better if the onions had caramelized."

BobbiBacha User ID: 7107370 106731
Reviewed Jan. 26, 2013

"I love this had a cold and did cooked this I feel better"

Lacywoodcox User ID: 5523674 95264
Reviewed Mar. 20, 2011

"I have made this soup many times and I absolutely love it! There is never any left over even with doubling the recipe!!"

barsaw User ID: 5783405 180291
Reviewed Jan. 25, 2011

"This soup was amazing. My husband loves French Onion soup and he raved about this recipe and it was so easy to make. Love it!"

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